A short-distance dual-node geomagnetic vehicle speed detection system and detection method

A vehicle speed detection, two-node technology, which is applied in the direction of road vehicle traffic control system, traffic flow detection, traffic control system, etc., can solve the problems of low resolution of time signal and uneven signal delay.

Active Publication Date: 2020-10-27
青岛诺蓝德智能科技有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a short-distance dual-node geomagnetic vehicle speed detection system and detection method, which can solve the problem of uneven signal time delay and low time signal resolution caused by short distances caused by the inconsistency of the electrical parameters of the two geomagnetic sensors. problem, improve the accuracy of vehicle speed detection, small size, low power consumption, easy to install

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  • A short-distance dual-node geomagnetic vehicle speed detection system and detection method
  • A short-distance dual-node geomagnetic vehicle speed detection system and detection method
  • A short-distance dual-node geomagnetic vehicle speed detection system and detection method

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[0059] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0060] like figure 1 As shown, the present invention provides a short-distance dual-node geomagnetic vehicle speed detection system, including dual geomagnetic sensing modules, wireless data transmission units, solar power supply modules and LED light-emitting modules, which can be installed on the ground without damaging the road surface, and can be used as a smart road Nodes and roadside nodes, wherein the dual geomagnetic sensor module uses two geomagnetic sensors, which are placed in the same direction with a distance of less than 10cm, used to collect waveforms when vehicles pass by, and send the collected data to the main The control chip performs data processing to obtain traffic information such as vehicle speed, which is used for traffic safety warning and other functions; the wireless data transmission unit ...

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Abstract

The invention discloses a short-pitch two-node geomagnetic vehicle speed detecting system and detecting method. The method comprises the steps: collecting a geomagnetic signal at time of vehicle passing to obtain two waveforms with a time difference; preprocessing the waveforms, removing backgrounds, and carrying out standardizing processing; on the basis of a band pair searching method based on aslope deviation degree, determining a band pair meeting a following requirement in the waveforms, calculating a time difference at time of vehicle passing by a dual-geomagnetic sensor for each band,and acquiring a vehicle driving speed of the corresponding band pair by combining a sensor pitch; and carrying out traverse on all data of the waveforms, selecting out all band pairs meeting the following requirement, acquiring speeds corresponding to all bands, and using an average value of the speeds as the speed of vehicle passing. Therefore, problems of signal delay ununiformity caused by inconsistent electrical parameters of the two geomagnetic sensors and low time signal resolution caused by the short pitch are solved; and the vehicle speed detection is improved, the size is small, the power consumption is low, and the system is convenient to mount.

Description

technical field [0001] The invention belongs to the technical field of vehicle speed detection, in particular to a short-distance dual-node geomagnetic vehicle speed detection system and a detection method. Background technique [0002] At present, the rapid development of Internet technology has promoted the rise of many industries in the society. Smart cities aim to integrate technology into the lives of citizens, which is a hot spot in current development. Intelligent transportation is a key component of the development of smart cities. The detection of traffic status is the basic task of developing intelligent transportation. The speed of vehicles is one of the important parameters that intuitively reflect the traffic status and is indispensable for the coordination of various functions of the intelligent transportation system. Important indicators. Traffic managers can judge traffic congestion according to vehicle speed, and realize reasonable speed limit setting and s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/042G08G1/052G08G1/01
CPCG08G1/0125G08G1/042G08G1/052
Inventor 王华全威陆凯旋田进保杨骁
Owner 青岛诺蓝德智能科技有限公司
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